Machine for coating electrotype-molds



3 Sheets-Sheefi 1. H. LOVEJOY & R. WHEELER. MACHINE FOR COATINGELEGTROTYPE PLATES.

No. 21,509. PatentedSept. 14, 1858.

' 3 Sheets-Sheet 2. H. LOVEJOY & R WHEELER. MACHINE FOR GGATINGELEGTROTYPE PLATES.

Patented Sept. 14, 1858.

3 Shets-$heet.3.

H. LOVEJOY 8c R. WHEELER. MACHINE FOR COATING ELEGTROTYPE PLATES.

No. 21,509. Patented Sept. 14, 1858.

UNITED STATES PATENT OFFICE.

HENRY LOVEJOY AND ROBERT WHEELER, OF BROOKLYN, NEW YORK.

MACHINE FOR COATING ELECTROTYPE-MOLDS.

Specification forming part of Letters Patent No. 21,509. dated.September 14, 1858.

'10 all whom it may concern:

Be it known that we, HENRY LOVEJOY and ROBERT WHEELER, both of Brooklyn,in the county of Kings and State of- New York, have invented certain newand useful Improvements in Machines for Coating Electrotype-Molds; andwe do hereby declare that the following is a full and exact descriptionof the same, reference being. had to the accompanying draw ings, and tothe letters of reference marked thereon, in whichi Figure 1 is a sideand Fig. 2 an end elevation of the machine. Fig. 3 is a plan view of thesame, and Figs. 4 and 5 are longitudinal and transverse sections of thewind-chest of the machine detached.

' Our invention consists in giving to the brush of the machine apeculiar motion by which its operation is rendered more thorough andperfect, and in combining with the operation of the brush a wind-blastfor the removal from .the mold of the superfluous coating material.

A is the frame of the machine, made of suf- I ficien-t height to bringthe bed upon which the waxmold is placed to an elevation where it 1 canreadily be reached by the operator of the machine, and to allow roombelow-the bed for the working parts hereinafter described.

B is the driving-pulley, attached to a shaft running in boxes upon theframeA, as shown, or to a line, or to a counter-shaft, as may be bestadapted to the circumstances in which the machine is used. It is made ofsufiicient width to allow two belts to be used on it and be changed inposition upon it, as hereinafter described.

U is the bed upon which the wax mold is laid to be coated, and whichruns back and forth upon suitable guides attached to the ways D.

E is the crankshaft that gives to the brush its motion, and from whichmotion is given to the fan-blower and to the bed 0. It has threepulleys, F F F, upon its outer end, the first turns it in a contrarydirection.

11 is a brush made of soft and pliable mate" rial, so-that ,the wax moldshall be uninjured by its movement over and upon it, whichis made aswide as the'bed O, and is attached to the brush-bar I at such distancebelow the bar as will allow the low r end of it to enter all thecavities of the mo d. The bar is attachedat one end to the crank of thecrankshaft E, to be moved by the rotation of the crank, and

to allow that cnd to vibrate laterally as the other end is carriedaround by the crank. By the brush being thus suspended and operated inan elliptical track, which gives to it its greatest efiiciency to enterand leave the interstices of the mold without injnrin g the deli catelines of its wax-impression. The bed 0 is moved back and forth by thescrew K, operating upon and in a nut in the arm L, attachedrunningoverthepulleyNon thecrank-shaftand the pulley O on the end of thescrew. The sidesof the arm L, as the arm is moved in either direction,are brought in contact with lugs on the shifting frame 0 when the bedhas moved to its extent in either directionvto change the belt which hasbeen operating on the fixed pulley of the crank-shaft to one of theloose ones, and the belt which was on the loose pulley onto the fixedone for the purpose of reversing the direction of the bed. This isefl'ected by the frame 0 moving the lever P, the bell-crank Q, the bar1', and the shifters R R.

S is a fan-blower located beneath the bed and operated from the pulley Ton the crankshaft through the belt U, by which a blast of air is blownthrough the wind-chest V upon the face of the mold to clear from themold the superfluous coating material. The blower is only operatedduring the forward movement as to blow off the superfluous coatingmaterial from the mold as the bed and mold move backby its belt beingthrown from a loose to a fixed pulley on its shaft by the same shiftingapparates that shifts the belts 011 the pulleys of the crank-shaft, andis by the same meansthrown ning upon the Med pulley on the crank-shafttheother operates one of the loose pulleys and is suspended at the otherend by the crank J,

it moves upon and over the face of the mold to the bed. The screw isrotated by the belt M, V

of the bed, (or from left to right in Fig. 1,) so

ward, at which time the coating operation is ordinarily completed. Theblower is operated I has anarrow aperture in itslowcr edge, throughwhich the wind is evenly distributed over the mold, a diaphragm-plate Nbeing placed beneath the pipe from the blower to disperse the v blastthroughout the chest.

The frame of the machine 1s inoased, suitable doors being made in thecase, through which the mold can be put into and taken out from themachine, and through which the machinery can be got' at to oil andadjust it, to keep the material used for coating the mold from flyingabout the room during the coating operation.

The mold to be coated is first dusted or cor cred with the coating(powdered plumbago or black-lead being generally used for that pur-'pose) and then placed upon the bed 0. The

' crank-shaft is then revolved, causing the brush H to move upon andover the face ofthe mold rapidly, while the bed and mold are movedslowly backward under it. When the bed has reached the extent of itstravel in that-dime tion the arm L causes the belts on the pulleys,

[under the brush more than once, it it is found necessary (or thesuccessful result of the. coating operation; but ordinarily it will befound to be completed by passing a single time.

,Thepreseut means of coating these molds are by brushin g the eoatin gmaterial into them, either by hand or by a machine which gives to thebrush a vertical or nearly vertical motion, and in both cases theoperation is incomplete, the superfluous material has afterward to beremoved by the slow'and tedious process of blowing it off from the moldby a hand-bellows. The hand process is slow, wasteful, and unhealthy,and the process by the vertically-moving brush does not insure a perfectcoating to the sides of the depressions of the mold, and does not removethe superfluous coating material from the mold.

We do not claim operating a brush by'mechanical means to coatclcctrotypcmolds with coating material; but

What we do claim as our invention, aiul desire to secure by LettersPatent, is-

1. suspending the brush-bar I by the crank J at one end, and attachingit to and operating it by the crank of the crank-shaft E at the otherend, in the manner and for the purpose set forth. v I

2. The combination of the brush II and bed 0 with the blower Sandwind-chest V, in the manner and for the purpose described.

11 mun? LOVEJOY. ltOli'lllt'l W Ll l ll l lll llt.

Witnesses:

Fun-Nels S. Low, lit/t liUGliMAN, Jr.

